Imagemagick Convert PDF to JPEG: FailedToExecuteCommand `”gswin32c.exe” / PDFDelegateFailed

You need to install Ghostscript in order to rasterize vector files (PDF, EPS, PS, etc.) with ImageMagick. IM will shell out to Ghostscript when doing these manipulations (you can see it if you use the -verbose tag in your IM invocation). You could also use Ghostscript by itself to rasterize vector files.